.S. President Donald Trump on Wednesday withdrew a threat to impose tariffs on a number of nations for their stance on ...

This week's stories show how fast attackers change their tricks, how small mistakes turn into big risks, and how the same old ...

He says governments could focus on public education, encouraging people to use winter boots and winter tires to reduce the ...

Abstract: The transverse linearly polarized beam can maintain its polarization when reflected, which is important for a detection system. Most of the existing planar Bessel beam generators are ...